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Showing 1–8 of 8 results
Advanced filters: Author: Alexandra Landsman Clear advanced filters
  • Characterizing higher order nonlinearities and responses to optical excitations in materials is challenging. Here, the authors use high harmonic generation in sapphire crystals to extract higher order susceptibilities and characterize the nonlinear electronic response directly from experimental measurements.

    • Seunghwoi Han
    • Lisa Ortmann
    • Alexandra S. Landsman
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-6
  • The shorter the antenna, the higher the frequency — so what happens when nanoantennas hit optical frequencies? One answer may lead to high-harmonic generation without the need for high-powered lasers.

    • Alexandra Landsman
    News & Views
    Nature Physics
    Volume: 13, P: 626-628
  • Time-resolved measurements of the X-ray photoemission delay of core-level electrons using attosecond soft X-ray pulses from a free-electron laser can be used to determine the complex correlated dynamics of photoionization.

    • Taran Driver
    • Miles Mountney
    • James P. Cryan
    Research
    Nature
    Volume: 632, P: 762-767
  • Ionization delays from ethyl iodide around a giant dipole resonance are measured by attosecond streaking spectroscopy. Using theoretical knowledge of the iodine atom as a reference, the contribution of the functional ethyl group can be obtained.

    • Shubhadeep Biswas
    • Benjamin Förg
    • Matthias F. Kling
    Research
    Nature Physics
    Volume: 16, P: 778-783
  • This study explores Above Threshold Ionization in atoms induced by intense X-ray radiation fields, where photon energy surpasses the ionization potential of valence electrons. The authors demonstrate that both the Keldysh and Reiss parameters are essential to capture the onset of strong-field behavior, revealing deviations from weak-field intensity scaling at higher X-ray intensities.

    • Spencer Walker
    • Alexandra S. Landsman
    ResearchOpen Access
    Communications Physics
    Volume: 7, P: 1-16